The week opens with a drier air mass over most of Costa Rica, with low humidity across the majority of the territory. The South Pacific and Southern Caribbean are the exceptions, where greater cloud cover and isolated rainfall persist. Soils remain moist in the Northern Zone and Caribbean while Pacific regions stay mostly dry.
Cold Surge #16, passing north of the country without directly entering, is driving a progressive increase in trade wind intensity through Tuesday to Thursday, with gusts reaching up to 50 km/h (31 mph) in the Central Valley, Guanacaste, and mountainous areas. The surge also brings increased moisture to the Caribbean slope, maintaining precipitation potential there.
By Friday, a gradual influx of greater moisture spreads across the national territory and continues into the weekend, while wind intensity decreases Saturday and Sunday. Temperatures remain generally warm throughout the week with no significant changes expected.
Trade winds pick up with gusts to 50 km/h (31 mph) affecting the Central Valley, Guanacaste, and higher elevations. Dry conditions dominate the Pacific while Caribbean moisture gradually increases.
Mornings: Windy in Central Valley, Guanacaste, and higher elevations. Mostly dry across the country except for the Caribbean and Northern Zone where occasional rainfall develops mainly in mountainous areas.
Afternoons: Mostly dry in the Central and North Pacific with windy conditions. The South Pacific may see isolated downpours. Precipitation possible in the northeastern mountains of the Central Valley with some spillover into the valley on Tuesday and Wednesday.
Nights: Moderate to strong winds continue. Rainfall develops in the Caribbean region Tuesday night.
A gradual influx of moisture spreads across the country while trade winds ease, increasing shower potential in multiple regions.
Mornings: Winds gradually decreasing. Humidity increasing nationwide. Caribbean and Northern Zone cloudiness increases ahead of weekend rainfall.
Afternoons: Likelihood of localized downpours increases in the Central Valley, Northern Zone, and South Pacific, associated with increased moisture and a low-pressure system developing in the Central Pacific.
Nights: More significant rainfall develops in the Caribbean, especially in Limón and mountainous areas as winds ease. Rains may partially extend into the Northern Zone.
Caribbean & Northern Zone: Moisture increases from Tuesday onward with occasional mountain rainfall. Weekend brings more significant precipitation in Limón and surrounding areas as winds ease and moisture builds.
Central Valley: Windy and mostly dry Tuesday through Thursday. Possible afternoon spillover from northeastern mountain showers Tuesday-Wednesday. Localized downpours increase Friday into the weekend as moisture influx arrives.
South Pacific & Southern Caribbean: The most active areas early in the week with greater cloud cover and isolated rainfall persisting while the rest of the country stays dry.
Pacific Regions: Mostly dry and windy through Thursday. A low-pressure system in the Central Pacific contributes to increased afternoon shower potential Friday through the weekend.
Guanacaste/North Pacific: Windy Tuesday through Thursday with gusts to 50 km/h (31 mph). Mostly dry and warm throughout the week.
Temperatures remain warm with no significant changes expected this week:
| Region | High °C (°F) | Low °C (°F) |
|---|---|---|
| Central Valley | 30° (86°) | 15° (59°) |
| North Pacific | 36° (96.8°) | 20° (68°) |
| Central Pacific | 32° (89.6°) | 18° (64.4°) |
| South Pacific | 32° (89.6°) | 18° (64.4°) |
| Caribbean | 28° (82.4°) | 20° (68°) |
| Northern Zone | 29° (84.2°) | 19° (66.2°) |
The North Pacific’s 36°C (96.8°F) high reflects the warm, dry conditions typical of Guanacaste in dry season. The Caribbean’s lower high of 28°C (82.4°F) reflects increased cloud cover from ongoing moisture in that region.
This forecast is based on outlooks from Costa Rica’s National Meteorological Institute (IMN).
